In a teaching or therapy environment, no other tool communicates the concept of elapsed time as well as the Time Timer. It has proven to be VERY useful with students with Autism, sensory disorder, and many special needs. Time Timer works as a VISUAL way to display how much time is left. To set the timer, move the red disk to the desired interval. The disk diminishes as time elapses until no red is visible. It’s a universal question asked by people from every walk of life. Elapsed time is an abstract concept that is difficult to understand and even harder to manage. Yet, managing time is a first step toward independence for many and a critical success factor for everyone. This important concept needs to be clearly understood to promote the efficient use of time. Today, there is a company dedicated to making the concept of elapsed time easier to understand for people of all ages and ability levels. Time Timer LLC is taking the idea of a simple, visual depiction of elapsed time and TIME MANAGEMENT: 60-minute analog countdown clock to stay on task, assists with organization and concentration. As time expires, the visible display of the red disk disappears in a clockwise direction. SPECIAL NEEDS: The visual design of the Time Timer helps ease transitions and encourages independence and productivity for all abilities, including those with Austism, ADHD, or other special needs. QUIET OPERATION: No loud ticking provides the silence and focus for school, homework, and other silent activities. Ideal for special needs, children, parents, teachers, office staff / professionals, and students. AUDIBLE ALERT: The optional alarm signal when time is up can be turned off for sound-sensitive environments. PRODUCT DETAILS: One AA battery not included. 3.25 inches x 1.75 inches x 3.60 inches. Portable, and the ideal size for individual use or small groups. The protective cover that snaps over the lens also flips open to serve as a desktop stand.